Set of Real Numbers Symbol
The set of real numbers symbol is the Latin capital letter “R” presented with a double struck typeface. The symbol is typically used to express that a variable is a member of the set of real numbers:
In plain language, the exppresion above means that the variable is a member of the set of real numbers.
Symbol  Format  Data 

ℝ  Unicode 

TeX 


SVG 
Usage
Set of Real Numbers  Concept
The set of real numbers contains the set of rational numbers as well as irrational numbers like pi, e, and the square root of two.